Mantis shrimps can detect UV light, and have 16 photoreceptors, compared to the three colour-detecting receptors humans have: green, blue and red. Our three photoreceptors reveal a rainbow to us - but ...

While some colorful diamonds get their pigmented ... The largest known fancy red diamond in the world is the 5.11-carat Moussaieff Red Diamond, owned by the Moussaieff high jewelry house in ...